@article{ref1,
title="Social force model for pedestrian dynamics",
journal="Physical review E, Statistical physics, plasmas, fluids, and related interdisciplinary topics",
year="1995",
author="Helbing, D and Molnar, P",
volume="51",
number="5",
pages="4282-4286",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1063-651X",
doi="",
url="http://dx.doi.org/"
}